Can not compile driver

> make
make[1]: Entering directory '/home/ranju/Downloads/mongo-c-driver'
CC src/mongoc/libmongoc_priv_la-mongoc-client.lo
src/mongoc/mongoc-client.c: In function 'mongoc_client_connect_tcp':
src/mongoc/mongoc-client.c:146:26: error: 'BSON_ERROR_BUFFER_SIZE' undeclared (first use in this function)
char errmsg_buf[BSON_ERROR_BUFFER_SIZE];
^
src/mongoc/mongoc-client.c:146:26: note: each undeclared identifier is reported only once for each function it appears in
src/mongoc/mongoc-client.c:146:15: warning: unused variable 'errmsg_buf' [-Wunused-variable]
char errmsg_buf[BSON_ERROR_BUFFER_SIZE];
^
Makefile:2547: recipe for target 'src/mongoc/libmongoc_priv_la-mongoc-client.lo' failed
make[1]: *** [src/mongoc/libmongoc_priv_la-mongoc-client.lo] Error 1
make[1]: Leaving directory '/home/ranju/Downloads/mongo-c-driver'
Makefile:3691: recipe for target 'all-recursive' failed
make: *** [all-recursive] Error 1
>